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Classes/Object 函数

trait_exists

(No version information available, might only be in SVN)

trait_existsChecks if the trait exists

说明

bool trait_exists ( string $traitname [, bool $autoload ] )

参数

traitname

Name of the trait to check

autoload

Whether to autoload if not already loaded.

返回值

Returns TRUE if trait exists, FALSE if not, NULL in case of an error.


Classes/Object 函数
PHP 手册